oj.uz

Submission #1035447

# Submission time Handle Problem Language Result Execution time Memory
1035447 2024-07-26T11:14:09 Z vjudge1 Political Development (BOI17_politicaldevelopment) C++17
16 / 100
 3000 ms 7256 KB 
#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math,inline")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,lzcnt,mmx,abm,avx,avx2,fma")
#include <bits/stdc++.h>
using namespace std;

#define all(x) x.begin(), x.end()

const int N = 5e3, X = 5e6;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, k, c, ans;
vector<int> vt, adj[N];
bitset<N> bt[N], bt2[N], r, taken, toTake;

void clean(int x) {
  for (int i = 0; i < n; i++) {
    if (adj[i].size()+1 < x) r[i] = 1;
  }
}

void dfs(int x) {
  if (c++ > X) return;

  int sz = taken.count();
  if (sz > ans) {
    ans = sz;
    clean(sz+1);
  }

  shuffle(all(adj[x]), rng);
  for (int& y : adj[x]) { 
    if (c++ > X) return;
    if (r[y] || taken[y] || (taken & bt2[y]).count() < sz) continue;

    taken[y] = 1;
    bitset<N> toTakePrev = toTake;
    toTake &= bt2[y];

    dfs(y);

    toTake = toTakePrev;
    taken[y] = 0;
  }
}

signed main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  cin >> n >> k;
  ans = 1;
  vt.resize(n);
  for (int i = 0; i < n; i++) {
    vt[i] = i;
    bt2[i][i] = toTake[i] = 1;

    int x; cin >> x;
    for (int j = 0; j < x; j++) {
      int y; cin >> y;
      bt[i][y] = 1;

      if (bt[y][i]) {
        bt2[i][y] = 1;
        adj[i].push_back(y);

        bt2[y][i] = 1;
        adj[y].push_back(i);
      }
    }
  }

  for (int i = 0; i < n; i++) {
    if (r[i]) continue;

    c = 0;

    taken.reset();
    taken[i] = 1;
    toTake = bt2[i];

    dfs(i);
  }

  cout << ans << "\n";
}

Compilation message

politicaldevelopment.cpp: In function 'void clean(int)':
politicaldevelopment.cpp:18:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   18 |     if (adj[i].size()+1 < x) r[i] = 1;
      |         ~~~~~~~~~~~~~~~~^~~
politicaldevelopment.cpp: In function 'void dfs(int)':
politicaldevelopment.cpp:34:54: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   34 |     if (r[y] || taken[y] || (taken & bt2[y]).count() < sz) continue;
      |                             ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 7 ms 6748 KB Output is correct
4 Correct 4 ms 6840 KB Output is correct
5 Correct 4 ms 6748 KB Output is correct
6 Correct 5 ms 6748 KB Output is correct
7 Correct 4 ms 6748 KB Output is correct
8 Correct 2 ms 3676 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 3676 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 7 ms 6748 KB Output is correct
4 Correct 4 ms 6840 KB Output is correct
5 Correct 4 ms 6748 KB Output is correct
6 Correct 5 ms 6748 KB Output is correct
7 Correct 4 ms 6748 KB Output is correct
8 Correct 2 ms 3676 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 3676 KB Output is correct
11 Correct 4 ms 6748 KB Output is correct
12 Correct 4 ms 6740 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 4 ms 6748 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 4 ms 6744 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 5 ms 6748 KB Output is correct
19 Correct 2 ms 3676 KB Output is correct
20 Correct 4 ms 6852 KB Output is correct
21 Correct 3 ms 6748 KB Output is correct
22 Correct 1 ms 3676 KB Output is correct
23 Correct 7 ms 6748 KB Output is correct
24 Correct 1 ms 3676 KB Output is correct
25 Correct 7 ms 6712 KB Output is correct
26 Correct 7 ms 6744 KB Output is correct
27 Correct 8 ms 6884 KB Output is correct
28 Correct 8 ms 6748 KB Output is correct
29 Correct 8 ms 6748 KB Output is correct
30 Correct 233 ms 6748 KB Output is correct
31 Correct 10 ms 6744 KB Output is correct
32 Correct 223 ms 6748 KB Output is correct
33 Correct 12 ms 6744 KB Output is correct
34 Correct 9 ms 6748 KB Output is correct
35 Correct 5 ms 3676 KB Output is correct
36 Correct 5 ms 3676 KB Output is correct
37 Correct 5 ms 3676 KB Output is correct
38 Correct 8 ms 2140 KB Output is correct
39 Correct 8 ms 2188 KB Output is correct
40 Correct 14 ms 6788 KB Output is correct
41 Correct 12 ms 2140 KB Output is correct
42 Correct 13 ms 6748 KB Output is correct
43 Correct 13 ms 6744 KB Output is correct

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3676 KB Output is correct
2 Correct 0 ms 604 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 604 KB Output is correct
10 Correct 0 ms 604 KB Output is correct
11 Runtime error 1 ms 1116 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 7 ms 6748 KB Output is correct
4 Correct 4 ms 6840 KB Output is correct
5 Correct 4 ms 6748 KB Output is correct
6 Correct 5 ms 6748 KB Output is correct
7 Correct 4 ms 6748 KB Output is correct
8 Correct 2 ms 3676 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 3676 KB Output is correct
11 Correct 4 ms 6748 KB Output is correct
12 Correct 4 ms 6740 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 4 ms 6748 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 4 ms 6744 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 5 ms 6748 KB Output is correct
19 Correct 2 ms 3676 KB Output is correct
20 Correct 4 ms 6852 KB Output is correct
21 Correct 3 ms 6748 KB Output is correct
22 Correct 1 ms 3676 KB Output is correct
23 Correct 7 ms 6748 KB Output is correct
24 Correct 1 ms 3676 KB Output is correct
25 Correct 7 ms 6712 KB Output is correct
26 Correct 7 ms 6744 KB Output is correct
27 Correct 8 ms 6884 KB Output is correct
28 Correct 8 ms 6748 KB Output is correct
29 Correct 8 ms 6748 KB Output is correct
30 Correct 233 ms 6748 KB Output is correct
31 Correct 10 ms 6744 KB Output is correct
32 Correct 223 ms 6748 KB Output is correct
33 Correct 12 ms 6744 KB Output is correct
34 Correct 9 ms 6748 KB Output is correct
35 Correct 5 ms 3676 KB Output is correct
36 Correct 5 ms 3676 KB Output is correct
37 Correct 5 ms 3676 KB Output is correct
38 Correct 8 ms 2140 KB Output is correct
39 Correct 8 ms 2188 KB Output is correct
40 Correct 14 ms 6788 KB Output is correct
41 Correct 12 ms 2140 KB Output is correct
42 Correct 13 ms 6748 KB Output is correct
43 Correct 13 ms 6744 KB Output is correct
44 Correct 8 ms 6996 KB Output is correct
45 Correct 0 ms 604 KB Output is correct
46 Correct 14 ms 6872 KB Output is correct
47 Correct 50 ms 7004 KB Output is correct
48 Correct 15 ms 6744 KB Output is correct
49 Correct 48 ms 7004 KB Output is correct
50 Correct 48 ms 7004 KB Output is correct
51 Execution timed out 3090 ms 7256 KB Time limit exceeded
52 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 7 ms 6748 KB Output is correct
4 Correct 4 ms 6840 KB Output is correct
5 Correct 4 ms 6748 KB Output is correct
6 Correct 5 ms 6748 KB Output is correct
7 Correct 4 ms 6748 KB Output is correct
8 Correct 2 ms 3676 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 3676 KB Output is correct
11 Correct 4 ms 6748 KB Output is correct
12 Correct 4 ms 6740 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 4 ms 6748 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 4 ms 6744 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 5 ms 6748 KB Output is correct
19 Correct 2 ms 3676 KB Output is correct
20 Correct 4 ms 6852 KB Output is correct
21 Correct 3 ms 6748 KB Output is correct
22 Correct 1 ms 3676 KB Output is correct
23 Correct 7 ms 6748 KB Output is correct
24 Correct 1 ms 3676 KB Output is correct
25 Correct 7 ms 6712 KB Output is correct
26 Correct 7 ms 6744 KB Output is correct
27 Correct 8 ms 6884 KB Output is correct
28 Correct 8 ms 6748 KB Output is correct
29 Correct 8 ms 6748 KB Output is correct
30 Correct 233 ms 6748 KB Output is correct
31 Correct 10 ms 6744 KB Output is correct
32 Correct 223 ms 6748 KB Output is correct
33 Correct 12 ms 6744 KB Output is correct
34 Correct 9 ms 6748 KB Output is correct
35 Correct 5 ms 3676 KB Output is correct
36 Correct 5 ms 3676 KB Output is correct
37 Correct 5 ms 3676 KB Output is correct
38 Correct 8 ms 2140 KB Output is correct
39 Correct 8 ms 2188 KB Output is correct
40 Correct 14 ms 6788 KB Output is correct
41 Correct 12 ms 2140 KB Output is correct
42 Correct 13 ms 6748 KB Output is correct
43 Correct 13 ms 6744 KB Output is correct
44 Correct 0 ms 600 KB Output is correct
45 Runtime error 1 ms 1112 KB Execution killed with signal 11
46 Halted 0 ms 0 KB -